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  <title>对字符串执行 ROT13 转换</title>
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  <div id="layout-content"><div id="function.str-rot13" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">str_rot13</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">str_rot13</span> &mdash; <span class="dc-title">对字符串执行 ROT13 转换</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.str-rot13-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>str_rot13</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
   ) : <span class="type">string</span></div>

  <p class="para rdfs-comment">
   对 <code class="parameter">str</code> 参数执行 ROT13 编码并将结果字符串返回。
  </p>
  <p class="para">
   ROT13 编码简单地使用字母表中后面第 13 个字母替换当前字母，同时忽略非字母表中的字符。编码和解码都使用相同的函数，传递一个编码过的字符串作为参数，将得到原始字符串。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.str-rot13-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">str</code></dt>

     <dd>

      <p class="para">
       输入字符串。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.str-rot13-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回给定字符串的 ROT13 版本。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.str-rot13-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-5958">
    <p><strong>Example #1 <span class="function"><strong>str_rot13()</strong></span> 范例</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">str_rot13</span><span style="color: #007700">(</span><span style="color: #DD0000">'PHP&nbsp;4.3.0'</span><span style="color: #007700">);&nbsp;</span><span style="color: #FF8000">//&nbsp;CUC&nbsp;4.3.0<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>


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